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ICU 77.1: i18n/unicode/timezone.h Source File

StringEnumeration;

int32_t* rawOffset,

int32_t

(uint8_t era, int32_t year, int32_t month, int32_t day,

uint8_t dayOfWeek, int32_t millis,

& status)

= 0;

int32_t

(uint8_t era, int32_t year, int32_t month, int32_t day,

uint8_t dayOfWeek, int32_t milliseconds,

int32_t monthLength,

& status)

= 0;

*region, int32_t capacity,

& status);

ZoneMeta;

char16_t* dereferOlsonLink(

&

);

char16_t* getRegion(

&

);

int32_t& minute, int32_t& second);

& formatCustomID(int32_t hour, int32_t min, int32_t sec,

TZEnumeration;

A Locale object represents a specific geographical, political, or cultural region.

Base class for 'pure' C++ implementations of uenum api.

TimeZone represents a time zone offset, and also figures out daylight savings.

static UClassID getStaticClassID()

Return the class ID for this class.

EDisplayType

Enum for use with getDisplayName.

@ SHORT_COMMONLY_USED

Selector for short display name derived from the time zone's fallback name.

@ LONG_GMT

Selector for long display name derived from time zone offset.

@ SHORT_GENERIC

Selector for short generic display name.

@ LONG

Selector for long display name.

@ SHORT_GMT

Selector for short display name derived from time zone offset.

@ LONG_GENERIC

Selector for long generic display name.

static UnicodeString & getIDForWindowsID(const UnicodeString &winid, const char *region, UnicodeString &id, UErrorCode &status)

Converts a Windows time zone ID to an equivalent system time zone ID for a region.

static int32_t getRegion(const UnicodeString &id, char *region, int32_t capacity, UErrorCode &status)

Gets the region code associated with the given system time zone ID.

virtual UClassID getDynamicClassID() const override=0

Returns a unique class ID POLYMORPHICALLY.

virtual void setRawOffset(int32_t offsetMillis)=0

Sets the TimeZone's raw GMT offset (i.e., the number of milliseconds to add to GMT to get local time,...

virtual TimeZone * clone() const =0

Clones TimeZone objects polymorphically.

static void setDefault(const TimeZone &zone)

Same as adoptDefault(), except that the TimeZone object passed in is NOT adopted; the caller remains ...

virtual bool operator==(const TimeZone &that) const

Returns true if the two TimeZones are equal.

static UnicodeString & getWindowsID(const UnicodeString &id, UnicodeString &winid, UErrorCode &status)

Converts a system time zone ID to an equivalent Windows time zone ID.

static StringEnumeration * createEnumerationForRawOffset(int32_t rawOffset, UErrorCode &status)

Returns an enumeration over time zone IDs with a given raw offset from GMT.

UnicodeString & getDisplayName(UBool inDaylight, EDisplayType style, UnicodeString &result) const

Returns a name of this time zone suitable for presentation to the user in the default locale.

static TimeZone * createTimeZone(const UnicodeString &ID)

Creates a TimeZone for the given ID.

virtual UBool useDaylightTime() const =0

Queries if this time zone uses daylight savings time.

UnicodeString & getDisplayName(const Locale &locale, UnicodeString &result) const

Returns a name of this time zone suitable for presentation to the user in the specified locale.

TimeZone(const TimeZone &source)

Copy constructor.

static const char * getTZDataVersion(UErrorCode &status)

Returns the timezone data version currently used by ICU.

virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, uint8_t dayOfWeek, int32_t millis, UErrorCode &status) const =0

Returns the TimeZone's adjusted GMT offset (i.e., the number of milliseconds to add to GMT to get loc...

static TimeZone * detectHostTimeZone()

Creates an instance of TimeZone detected from the current host system configuration.

TimeZone(const UnicodeString &id)

Construct a TimeZone with a given ID.

static UResourceBundle * loadRule(const UResourceBundle *top, const UnicodeString &ruleid, UResourceBundle *oldbundle, UErrorCode &status)

Utility function.

static StringEnumeration * createTimeZoneIDEnumeration(USystemTimeZoneType zoneType, const char *region, const int32_t *rawOffset, UErrorCode &ec)

Returns an enumeration over system time zone IDs with the given filter conditions.

TimeZone & operator=(const TimeZone &right)

Default assignment operator.

UnicodeString & getDisplayName(UnicodeString &result) const

Returns a name of this time zone suitable for presentation to the user in the default locale.

static UnicodeString getEquivalentID(const UnicodeString &id, int32_t index)

Returns an ID in the equivalency group that includes the given ID.

static TimeZone * forLocaleOrDefault(const Locale &locale)

If the locale contains the timezone keyword, creates a copy of that TimeZone.

static const char16_t * getRegion(const UnicodeString &id, UErrorCode &status)

Returns the region code associated with the given zone, or nullptr if the zone is not known.

virtual UBool hasSameRules(const TimeZone &other) const

Returns true if this zone has the same rule and offset as another zone.

UnicodeString & getDisplayName(UBool inDaylight, EDisplayType style, const Locale &locale, UnicodeString &result) const

Returns a name of this time zone suitable for presentation to the user in the specified locale.

static int32_t countEquivalentIDs(const UnicodeString &id)

Returns the number of IDs in the equivalency group that includes the given ID.

static void adoptDefault(TimeZone *zone)

Sets the default time zone (i.e., what's returned by createDefault()) to be the specified time zone.

TimeZone()

Default constructor.

static UnicodeString & getCanonicalID(const UnicodeString &id, UnicodeString &canonicalID, UErrorCode &status)

Returns the canonical system timezone ID or the normalized custom time zone ID for the given time zon...

static StringEnumeration * createEnumeration(UErrorCode &status)

Returns an enumeration over all recognized time zone IDs.

static StringEnumeration * createEnumeration(int32_t rawOffset)

Returns an enumeration over time zone IDs with a given raw offset from GMT.

bool operator!=(const TimeZone &that) const

Returns true if the two TimeZones are NOT equal; that is, if operator==() returns false.

virtual int32_t getOffset(uint8_t era, int32_t year, int32_t month, int32_t day, uint8_t dayOfWeek, int32_t milliseconds, int32_t monthLength, UErrorCode &status) const =0

Gets the time zone offset, for current date, modified in case of daylight savings.

static StringEnumeration * createEnumeration(const char *region)

Returns an enumeration over time zone IDs associated with the given region.

static StringEnumeration * createEnumeration()

Returns an enumeration over all recognized time zone IDs.

static UnicodeString & getIanaID(const UnicodeString &id, UnicodeString &ianaID, UErrorCode &status)

Returns the preferred time zone ID in the IANA time zone database for the given time zone ID.

virtual int32_t getRawOffset() const =0

Returns the TimeZone's raw GMT offset (i.e., the number of milliseconds to add to GMT to get local ti...

static UnicodeString & getCanonicalID(const UnicodeString &id, UnicodeString &canonicalID, UBool &isSystemID, UErrorCode &status)

Returns the canonical system time zone ID or the normalized custom time zone ID for the given time zo...

virtual UBool inDaylightTime(UDate date, UErrorCode &status) const =0

Queries if the given date is in daylight savings time in this time zone.

static const TimeZone & getUnknown()

Returns the "unknown" time zone.

static StringEnumeration * createEnumerationForRegion(const char *region, UErrorCode &status)

Returns an enumeration over time zone IDs associated with the given region.

static const TimeZone * getGMT()

The GMT (=UTC) time zone has a raw offset of zero and does not use daylight savings time.

virtual int32_t getDSTSavings() const

Returns the amount of time to be added to local standard time to get local wall clock time.

virtual void getOffset(UDate date, UBool local, int32_t &rawOffset, int32_t &dstOffset, UErrorCode &ec) const

Returns the time zone raw and GMT offset for the given moment in time.

static TimeZone * createDefault()

Creates a new copy of the default TimeZone for this host.

UObject is the common ICU "boilerplate" class.

UnicodeString is a string class that stores Unicode characters directly and provides similar function...

U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)

Global operator == for StringPiece.

USystemTimeZoneType

System time zone type constants used by filtering zones in ucal_openTimeZoneIDEnumeration.

int8_t UBool

The ICU boolean type, a signed-byte integer.

C++ API: Common ICU base class UObject.

void * UClassID

UClassID is used to identify classes without using the compiler's RTTI.

struct UResourceBundle UResourceBundle

Basic definitions for ICU, for both C and C++ APIs.

UErrorCode

Standard ICU4C error code type, a substitute for exceptions.

#define U_I18N_API

Set to export library symbols from inside the i18n library, and to import them from outside.

double UDate

Date and Time data type.

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